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Produced-Fluids Treatment and Oil and Gas Separation

New Pond Road,
GU3 1HU,
United Kingdom
Fax Number

Opus provides innovative solutions for produced-fluids treatment and oil and gas separation to enhance the throughput and environmental performance of production facilities.

From its UK bases in Orkney and Surrey, Opus offers oil and gas operators the expertise and facilities to embrace all aspects of produced water treatment and oil and gas separation, providing a comprehensive resource from the initial concept through to commissioning.

Changes in flow conditions over a field’s lifetime can substantially affect the performance of assets. Bespoke solutions from Opus meet all conditions encountered. Verified by experienced personnel and a combination of visual dynamic modelling (VDM) and computational fluid dynamics (CFD), each solution provides assurance for both current and future case conditions. Opus manages the design, fabrication, installation and commissioning of all its technology.

Compact flotation unit

Two-stage Opus CFU package with reject collection system.
Two-stage Opus CFU package.
Opus Mare's Tail® technology.
Opus Mare's Tail coalescer technology.
Simulating separator motion at the Opus test facilities.

Opus compact flotation technology is a multi-phase separator that has no moving parts and does not require any external energy. Compact, cost-effective, and easy to install and maintain, the Opus compact flotation unit (CFU) offers numerous additional benefits to meeting offshore industry regulations. Package supply, installation and commissioning is ensured by a dedicated project team. Features include:

  • Easy and stable operation
  • Performance maintained at turndown conditions
  • High flow capacity
  • Insensitive to motion, proven performance on floating production systems
  • Handles high solids loading
  • Robust performance in slugging flow and variable inlet oil content
  • Operates at low pressure; can operate at higher pressures
  • Adaptable skid layout to suit installation and restricted access
  • Low operator intervention
  • Designed for retrofit on to existing platforms
  • Inter-stage or pre-stage coalescence with the Opus Mare’s Tail®

Oil coalescer

The Mare’s Tail coalescer was developed to meet a recognised need from the industry for an efficient, cost-effective technology to coalesce small oil droplets and thus improve the removal of oil from produced water.

The Mare’s Tail coalescer can be easily retrofitted into existing installations or fitted as part of a water treatment package for a new installation. The Mare’s Tail technology offers a number of key benefits to the end-user, including:

  • Tolerant to high solids loading
  • Improves the quality of produced water
  • Enhances the performance of existing water treatment technology
  • Extends the turndown
  • Unaffected by heave or roll, making it ideal for FPSO applications
  • Compact and easy to install and maintain
  • Cost-effective, best-available technology
  • Self cleaning
  • Media replacement does not require vessel intervention

Process equipment upgrade

Whether multiphase separators, gas scrubbers, flare drums or produced water systems, Opus provides the dedicated management, expertise and technology to ensure the successful upgrade of process equipment.

Opus considers all aspects of an upgrade project to ensure that core problems are identified and solved. A wealth of experience means Opus engineers know where to look, what to look for and which technology is best employed. From survey to study phase, through to implementation, Opus unearths the problems and applies the solutions. Opus solutions can:

  • Enhance system performance
  • Increase throughput and product quality
  • Maintain cost-effectiveness
  • Provide effective troubleshooting
  • Improve produced water quality
  • Manage transient conditions (slugging / surging)
  • Optimise chemical treatment
  • Improve operability

Opus internals technology and validation methods are robust and proven in the field. The combination of experience, skills and technology allows Opus to meet and exceed client objectives while achieving cost-effective results.

Opus’s quality management system has been registered by National Quality Assurance under the provisions of BS EN ISO 9001.

White Papers

Press Releases

  • Opus Announces Securing of £2.3m Clutch of Contracts

    Produced water treatment and oil and gas separation specialist, Opus – which is exhibiting at this week’s Offshore Europe – has announced the recent securing of a series of contracts totalling around £2.3m in value. The leading technology and solution provider, which has bases in Guild

  • Opus Releases White Paper on Production Optimisation Services

    Opus, a provider of innovative solutions for produced-fluids treatment and oil and gas separation to enhance the throughput and environmental performance of production facilities, has released a free white paper on the Offshore-Technology website. Opus delivers the expertise and facili

  • Technology Evaluation at Opus

    Opus has recently concluded a contract with a leading European engineering company to provide a detailed performance evaluation of a specialist ceramic membrane technology. Pell Frischmann Process Technology previously carried out field trials at a UK oilfield site, with the support of t

  • Opus Completes Upgrade Project for Talisman Energy

    Opus has recently concluded a specialised upgrade project in the North Sea for Talisman Energy (UK) Limited. The leading technology and solution provider, which has a base in Guildford and on Flotta, Orkney, has completed the upgrade of two first-stage separators onboard the Fulmar platf

  • Opus Completes Fast-Track Separator Upgrade

    Opus has completed a £300,000 separation and produced water upgrade project for floating production contractor Bluewater Energy Services. The project involved Opus investigating and recommending effective upgrade solutions to enhance the performance of the first-stage production separato

  • Opus Successfully Completes Specialist Sloshing Analysis

    Produced water treatment, oil and gas separation and aquatic toxicology specialist, Opus, has successfully concluded a specialised sloshing analysis project, which posed a number of unique challenges. The contract – carried out for a major oil company – tasked Opus with carrying out a 3

  • Opus Forms Strategic Partnership with Cd-Adapco

    Produced water treatment, oil and gas separation and aquatic toxicology specialist, Opus, has formed a strategic partnership with major engineering simulation technology and solutions provider CD-adapco. In a move to further enhance both companies' specialised services through combining

  • Opus Set To Seek Out International Opportunities

    Representatives from Opus, are set to undertake international trips and attend prestigious industry events later this month, as the firm looks to further expand its global reach. The company is exhibiting at the Australasian oil and gas exhibition and conference in Perth, Australia, fro

  • Extensive Separation Study

    Opus has recently concluded a detailed study for Wood Group Engineering (North Sea), on behalf of BP. The three-month study required Opus to perform a review of several separation vessels at the existing BP Dimlington Terminal, which is part of BP's North Sea Southern Gas Asset.

  • Solids Characterisation Project

    Opus has recently completed an in-depth solids characterisation project for leading energy services company, Wood Group, on behalf of Hess Limited. The contract - which was worth around £30,000 - involved Opus assessing the quality of fluids within the water treatment system onboard the

  • Milestone CFU Project

    Opus has recently completed a milestone project to supply its compact flotation technology for the offshore Brazil region. Opus has completed the contract awarded by Houston-based J Ray McDermott Engineering, worth around £1million, to supply a skid-mounted compact flotation unit (CFU) f

  • Opus Commissions CFU Package

    Opus has recently completed a project to commission their skid mounted compact flotation unit (CFU) supplied to a major international oil and gas company. The project, which was worth around £1.5 million and saw Opus design, construct and install the unit onboard one of the client's oil

  • Specialist Contracts with Talisman Energy

    Opus Environmental Laboratories - the ecotoxicology, environmental monitoring and consultancy branch of Orkney-based Opus Plus - has recently secured two specialised contracts, worth in the region of £70,000, with Talisman Energy (UK). Opus has been awarded the work to carry out enviro

New Pond Road
United Kingdom

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